Portable drilling-machine.



' W. P. SCOTT.

PORTABLE DRILLING MACHINE. APPLIGATIONZHLED MAR'. 24, 190s.

110.781,3'70. PATBNTED JAN. 31, 1905.

ful" I 'Il Il r 1 f jizz/232514.- l Zz/Zr No.` 781,370v

l' UNITED STA-TES- Paten'ted. January 31,' 1905.

PATENT, OFFICE.

WILLIAM-F. SCOTT.; `oF M CKEES. vRoeKsi PENNSYLVANIA, AssiduoRv oF4 ONE-'HALF To F.l HMCKINNIE AND s. D. RoBIsoN,A oF- sEWIcKLEY,

VFIJNN'sYLfv AN-IA, AND-c. w. RoBIs'oN, oF MCKEEs'RoeKs, P'InINsYL- VANIA PORTABLE DRILL'ING-MACHINE.

SPECIFICATION ,forming part gf' Lettere Patent No. 781,370,v dated January 31, '1905.'

' Application ledMaLrch 24, 1903. Serial No. 149.356l

.To n/Zl 'nfl-1,0721, ma@ concern:

Be it. known that L'WILLIAM ]5.'Soo'rfr,y a.

citizen of the- UnitedStates iof America, re-

' .siding at McKees Rocks, -inthefjcou'nty of Al-l legheny and State yoffPennsylvania, have' in- .vented certain new and useful Improvements in Portable DrilliI1g--l\/Iachines,l of which the following is a specilicatiomy reference Abeing had thereinto the accompanying drawings..A

useful improvementsin portable drilling-machines capable of Ageneral. application', but adapted especially for the-drilling offhard metals, compressed'airb'eing employed asa .motive fluid', provlslon being made for come Inunlcatmg rotation of .the-motor or'powerwheel to thedrill-chuckthrough'the medium .i .of interposed -gears o r other mechanism.

30. the power-.wheel vor piston.

, A furtherobject'of myinventionis to provide novel means for feeding the lcompressed air or other motive fluidi-nto" the cylinder'of the motor insuch a manner that the fullforce of the same acts upon the bladesor fansof' 'the-power-wheel'whereby to obtain anexc'eedinglfy high rate 'of speed 'of this wheeLthe interposed gearing or;other driving mechan- -ism between the wheel .and lthe drill-chuckv "serving to decrease the number of revolutions -ofthe drill-chuck', whereby thelatter may be rotated at-a materially less rate of speed than My invention' also'contempl'ates improve.-

c mentsin `the general construction ofi th'evice, of this character whereby to obtain a greater efficiency from the same, among which 1s the-provlslon of automatic olhng` means for the bearings of the interposed `gearing employed fordecreasing the speed 'of the drillchuck and in means 'for regulating thequantityfof motive fluid admitted to the cylinder, together with the particular manner of introducing the fluid into'the cylinder whereby tol obtain a greater effectiveness and efficiency of In describing the invention in detail refer# .2 of vthe annular casing l.

in like numeralsof reference indicate like l parts throughout-the several views, in which-'- Figure l is Aa central vertical sectional View of my improved portable drilling-machine;

Fig. 2 is a horizontal sectional'view taken on the line 2.2 o f Figui.; Fig. Sis a longitudinal sectional viewl of the motive-ilui'd-eontrolling 4 Ineans. Fig. Lisa cross-sectional v'iew of the same.' This invention'relatesto eertaln'new and To put-my invention int-'o practice, l provide an lannular casing l, provided with a flange or rim Zand the bottom or fbase -3 of which' is l providedwith a bearing-hub4 to receive the shaft' 5 ismounted in suitable antifrictionbearings?, the chuck being held by means of the screwoap 8v engaging the' hub. The bottor'nl plate 3 of the casing or shell is provided 'also'.with a hollow hub' or extension`9, which vforms an oil-.reservoirand is closed atits outer i endby means of a threaded block lO.

and which is provided with a rpassage Way or Into i this hollow haber-,extension extends a stubshaft-11, the lower portion of which vis hollow" port 12, leading through tothe other end of 4 y the shaft."l The said shaft is rounded at its upperend and engages the bearing 14 provided therefor, andon this shaft is mounted a gear- .16' and pinion 1T," which mesh,l resl'iectively;V

with the: gear 18 on the shaft and thepiniou 19 on .the-,'stub-sh'aft 20.-

This stub-shaftv 20' is carried in the hub 2l of the motor o r powerj wheeh which wheel embodies a hub and the integral curved vanesor blades 22, the ends 1 y of which contactwith the annular shell 23,;the

lower edge'of which rests on the vplate 24C and the' upper edge of which-s integral with the top plate 25, havinga flange`26, which is firmly -secured by bolts 27 tothe plate 24 and flange These tie-bolts 27 are preferably passed through sleeves or.cas- 'I ings 2 8, interposed between the flange'26 and -the plate 21Ll` The hub'21 is provided with suitable antifriction-bearings 29, and a feedv device 30 is provided with'suitableantifrioordinary.construction,A embodying a sleeve having a pointed upperend, which may be en; I gaged with'any suitable object, and provided with handles on itsperiphery, which sleeves receive the threaded screw extending' through gagement with another ot1 said varies or blades,

both driving in the same direction. A 'suitable outlet or exhaust port 3 4iv`s `provided at any desiredr point between the'two inlet-ports in thefwall o'fthe shell 23.

The motive .iuid isfedto the inlet-ports simultaneouSly` and to this end the feed-pipe 35, which is connected to both of the portsBQ; 33, has attached thereto the union 36, and for controlling the quantity of motive fluid ad- Vice embodying' a tube 37 connectedl tothe union 36 and provided intermediate ij s ends with-a partition 38. ...The tube is provjded'in l its walls at each side of this ,partitidn with' to cut off commnnicationeither partiallyor` ports 39, and mounted on the tube fer'iotation thereon is a sleeve 40, provided with ports 41, adapted when the sleeve is in one position to .establish communication through ports 39 on 'one side ofpartition 38 across the ports 39 at the other side of the partition and when the sleeveis given a one-quarter turn adapted 4wholly between` these points, and thereby either regulating or entirely shutting oithe quantity of mot-jive fluid admitted.

p' It' will of course be evident that whenqthe tool is being vused in. the inverted position` from that shown in Fig. 1 the oil contained in reservoir 10' will readilyfeed through the lport 12 to lubricatethe bearing 14, and in practice I have found that when used in posi-.- tion as shown in Fig. 1 this bearing is alwaysV iubricated, as a suiiieient quantity of the compressed air always escapes, which in its attempt to find exit passes in around the lower end ofv shaft 11,` whereby to elevate the oil and force the same up the passage v12.

I desire to Call'partiCular attention to the manner in which the motive liuid is projected into the cylinder and into engagement with the varies orblades of the piston or powerwheel. This air striking these blades or vanes in the manner as will be observed by reference to Fig. Qexerts the fullest possible ex- -tent of its pojver thereon, whereby to impart an exceedingly great revolution vof the powerwheel or piston and derive the greatest possible ecie'ncy from the same. Through the medium of the intermediate gearing the drillchuck is geared down, whereby the drill will be driven at a rate of speed consistent with 'that required for thisclass of work. v p In order that the device can be conveniently handled,lI provide a side handle 42, as well as 'the' handles employed on the feed device.

' Having fully described my invention, what mitted I- preferably employ -a regulating de,

I claim 'as new, and desire to secure by Letters Patent, is `In a device of the characterdescribed, a circular casing having -an air-chamber, airsupplypipes leading to inlets inf the casing opening into said 'air-chamber at diametrically opposite points, a wheel arranged' in the air-chamber and consisting of a hub and three curved wings, each wing' being disposed in a directionl substantiallyy tangential to the hub and with their concave sides toward the air-inlets, whereby the incoming air will strike the wings substantially ,on a direct line Jfrom the time it`enters the chamber until it exhausts from same, and the said easing. having an air- Ioutlet located between the'said air-inlets,

whereby d eadair spaces are avoid `ed.

In testimony whereofl aiix my signature in thejpresence of two witnesses.

"WILLIAM F. SCOTT.l

Vl/'itnesseszv A. M.- WILSON,

E. Porras. 

